JP2003093972A - Improved soil screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sieving efficiency by charging excavated soil and a reforming material such as quick lime into a mixer, subjecting a mixture to blending, crushing and stirring to obtain reformed soil 8, and crushing nodule in which particles 8' are mutually stuck or soil clods 8" in a vibrating sieve 1. SOLUTION: A horizontal bottom plate 4' is interposed between a material diffusing weir 3 and a material charging part 4 which are provided at a starting end part of a screen 2 of the vibrating sieve 1. Material raising guiding weirs 5, 5 are provided at the middle and/or at a terminal part of the screen 2. These weirs 3, 5, 5 are provided at both side plates 7, 7 of the vibrating sieve 1 with freely attaching/detaching.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating screen which mixes an improving material such as quick lime with excavated soil and crushes and agitates the soil (referred to as improved soil) to a designated granular soil.

[0002]

2. Description of the Related Art In an excavated soil improvement facility, an improved material such as quick lime is put into a excavated soil to a mixer to mix, crush and
The agitated soil (hereinafter, improved soil) needs to be sieved into the granular soil designated by the local government in the next process.

A vibrating screen is usually used for this sieving, and a mesh made of metal or urethane makes the product (improved soil) that passes through this mesh, and the one that cannot pass through is crushed by a crusher or again. , Is circulated and put into a mixer, or is discharged as it is and discarded as bad soil.

[0004] If the raw material is soil with no adherence such as sand or gravel, it can be easily sifted to the product size even with a vibrating screen, but in the case of highly viscous soil or soil with high moisture content The improved soil that has been mixed, crushed, and agitated with each other causes the particles to adhere to each other during the transportation process such as the belt conveyor until it reaches the vibrating screen, and originally, a single particle can pass through the screen mesh of the vibrating screen. The substances flowed on the sieve mesh in the as-attached state, which reduced the product yield and deteriorated the profitability of the equipment.

[0005]

SUMMARY OF THE INVENTION The present invention improves the yield of the product (improved soil) by crushing the product adhered in the process of conveying such improved soil on a sieve screen with a vibrating screen. The purpose is to

[0006]

In order to achieve the above object, the present invention firstly provides a material diffusion weir and a material charging section at the beginning of the screen of the vibrating screen, and guides the material upward at the end of the screen. An improved soil screen provided with a weir, a second improved soil screen according to the first aspect of the present invention in which a material raising guide weir is also provided in the middle of the screen, and a third weir is between both side plates of the vibrating screen. The improved soil screen according to the first or second invention, which is detachably provided on the.

Therefore, the arrangement of the weir is determined by the particle size and the property of the raw material at two points of the improved soil feeding section and the discharging section or at one or several points of the intermediate section.

The charging section is installed for the purpose of protecting the mesh from abrasion and damage when the mesh size is small, dispersing the improved soil from the charging section over the entire mesh width, and slightly crushing.

The intermediate part and the discharge part provide a striking force between the adhering particles by a weir, lift the raw material by the vibration of the vibrating screen, and the vibrated mesh when falling forward or backward. , The adhesion can be released.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Both side plates 7 by a plurality of connecting rods 9,
7 are integrally formed, and a plurality of parallel horizontal connecting rods 9 ′, 9 ′ provided on the lower portions of the both side plates 7, 7 are sieved through supporting rods 9 ″, 9 ″ parallel to the both side plates 7, 7. The net 2 is detachably stretched between the side plates 7 and 7, and two vibrators 10 and 10 are provided in the middle upper portions of the side plates 7 and 7, respectively, and the output of the reduction motor 12 is provided on the rotary shaft 11 thereof. Connect the axes.

Support pins 13 and 13 are provided at the lower outer portions of the both side plates 7 and 7 so as to project from the front and rear, respectively.
13 is pivotally supported by a bearing 14, and the bearings 14 and 14 are respectively supported on a stationary machine frame 16 via springs 15 to form a vibrating screen 1.

The operation of the sieving net 2 is repeated with the both side plates 7 and 7 in an up-and-down motion in an oblique front-back direction, and when the sieving net 2 rises, it is flipped up.

An upright weir 3'is detachably provided between both side plates 7 and 7 by bolts 17 on the starting end of the sieve net 2, and the upright weir 3'is directed upward through a horizontal bottom plate 4 '. The material introduction part 4 is interposed between the both side plates 7, 7 to form the material diffusion weir 3 by the upright weir 3 '.

A material rising guide weir 5 which is inclined upward by 15 to 75 degrees toward the material discharge side is detachably installed between both side plates 7 and 7 with bolts 17 on the terminal end of the screen 2.

Further, one or a plurality of material rising guide weirs 5 are inclined between the side plates 7 and 7 upwardly by 15 to 75 degrees toward the discharge side in the middle of the screen 2. And detachably installed.

The material diffusion weir 3 of the charging section 4 is made to stand upright on the 90-degree sieve mesh 2, but the terminal end (discharging section) and the above-mentioned ascent guide weirs 5, 5 are located near the weirs 5, 5. The inclination can be appropriately changed to 15 to 75 degrees by adjusting the bolt 17 and the plurality of bolt holes so as not to impair the sieving performance due to the retention of the material in the above.

The above weirs 3, 5 and 5 are detached and replaced by the weir 3,
This is taken as a measure against damage due to wear of 5 and 5.

As shown in FIG. 3, when the improved soil 8 is fed from above the material feeding portion 4, the improved soil 8 moves from the feeding portion 4 onto the horizontal bottom plate 4'and is blocked by the upright weir 3 '. At the same time as it vibrates and ascends the upright weir 3 ', it horizontally diffuses to both sides along the upright weir 3'as shown in FIG.

In a diffused state, it is evenly distributed along the upper end of the upright weir 3'over the entire inner width of both side plates 7 and 7 over the weir 3 and drops onto the sieve net 2 and is attached to them to form aggregates or aggregates. The improved soil 8 which has become 8 "is temporarily crushed.

As shown in FIG. 5 (b), the fan does not expand toward the middle of the screen 2.

It is placed on the vibrating screen mesh 2 over the upright weir 3 ', and the above-mentioned vibration and jumping of the screen mesh 2 causes the improved soil to move toward the end part, and in the middle part of the screen mesh 2, it reaches the end part. Ascending upwards along the material rising guide weir 5, the light and thin particles 8'fall over the weir 5 as shown in FIG. 4, but particles 8'are attached to each other as aggregates or agglomerates. 8 ″ is lifted up on the guide weir 5 and then dropped to the starting end side (arrow a) to be crushed and sieved by the sieve mesh 2.

After the ascent, the aggregates or nodules 8 "that have passed the guide weir 5 toward the terminal end fall and are hit by the sieve mesh 2 to be crushed,
It is sieved by the sieve mesh 2.

Further, also at the terminal end of the sieve screen 2, the above-mentioned adhering aggregates or agglomerates 8 "drop to the starting end side and are crushed, and the crushed particles 8'fall from the sieve screen 2 as a sieve under the size, The sieving surface rises along the rising guide weir 5, passes through the guide weir 5, and is discharged from the end portion.

The angle of the rising guide weir 5 is appropriately determined according to the mesh, the particle size of the improved soil, the degree of attachment, the aggregated or aggregated state, etc., and the upright weir 3'at the starting end does not necessarily have to be upright. Due to the above state of the improved soil, it is possible to incline upward to the terminal end side.

[0025]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the viscous soil and the improved soil having a high water content are diffused in the width direction by the diffusion weir at the start end portion of the vibrating screen, thereby expanding the utilization efficiency of the vibrating screen. Aggregates or agglomerates attached to each other as well as rising up each weir, inverted fall to the return side and crushed, the crushed particles are sieved by a sieve mesh and separated into upper and lower sieve, Moreover, aggregates or agglomerates that have passed over the above weirs are dropped on the sieve mesh, crushed, and separated on the sieve and under the sieve, which has the effect of improving the sieving efficiency of the improved soil by the vibrating sieve.

[Brief description of drawings]

FIG. 1 is a side view showing an improved soil screen of the present invention.

FIG. 2 is a front view taken along the line AA of FIG.

FIG. 3 is an enlarged vertical sectional side view of a material diffusion weir and a material charging unit.

FIG. 4 is an enlarged vertical side view of the material rising guide weir.

FIG. 5A is a plan view of a material diffusion state. (B) is a plan view of a conventional material diffusion state.

[Explanation of symbols]

1 vibrating screen 2 sieve mesh 3 Material diffusion weir 4 Material input section 5 Material rising guide weir 7 both sides frame

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E02F 7/00 E02F 7/00 D (72) Inventor Kazuyuki Murata 958, Ariyasu, Shonai Town, Kaho-gun, Fukuoka Prefecture No. 23 Koukibukuro Co., Ltd. (72) Inventor Hiroyuki Yano 958 Ari, Shonai-cho, Kaho-gun, Fukuoka Prefecture F-Term No. 23 Koukibukuro Co., Ltd. (reference) 4D021 AA01 AB02 CA05 CA07 CB01 CB11 DA01 DA03 DA13 DA20 DB11 EA10

Claims (3)

[Claims] 1. An improved soil screen comprising a vibrating screen provided with a material diffusion weir and a material feeding part at the beginning of the screen and a material rising guide weir at the end of the screen. 2. The improved soil screen according to claim 1, further comprising a material rising guide weir provided in the middle of the screen. 3. The improved soil screen according to claim 1, wherein the weir is detachably provided between both side plates of the vibrating screen.